I don't think that Yamaha uses CMC Magnetics. I think that the disc's are made by Mitsubishi Chemicals. Since Yamaha has done bussiness in the past with Mitsubishi Chemicals. Still these disc's could be CMC but I personally think there not.

Well to put it simple there are no TY disc's that are made in Taiwan reported so far. If anyone has a taiwanese TY disc I really would like to know and I think also TY likes to know who used there manufacturing code or who used there old stampers. Some European factories had mayor problems for using old TY stampers.